Frost dates for Phantom Rch, AZ
At Phantom Rch, the median last spring frost (32°F) is Feb 9 and the median first fall frost is Dec 5, for a typical growing season of 295 days. For a 90% chance that the last frost has passed, wait until Mar 4. Nearby ZIP codes are in USDA hardiness zones 6b to 7b.
- Feb 9Last spring frost (median)50% chance of 32°F after this date
- Mar 4Safer planting date10% chance of 32°F after this date
- Dec 5First fall frost (median)50% chance of 32°F by this date
- 295 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | Feb 13 | Mar 3 | Mar 21 |
| 32°F | Jan 20 | Feb 9 | Mar 4 |
| 28°F | Dec 27 | Jan 22 | Feb 14 |
| 24°F | Dec 17 | Jan 7 | Jan 30 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Nov 11 | Nov 23 | Dec 6 |
| 32°F | Nov 21 | Dec 5 | Dec 23 |
| 28°F | Dec 2 | Dec 20 | Jan 13 |
| 24°F | Dec 13 | Jan 1 | Jan 26 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 240 days | 263 days | 285 days |
| 32°F | 272 days | 295 days | 323 days |
| 28°F | 305 days | 335 days | 363 days |
| 24°F | 341 days | 365 days | 365 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 90% |
| 24°F | 37% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 86023 | 7a | 0 to 5°F | 10 km |
| 86052 | 6b | -5 to 0°F | 20 km |
| 86020 | 7b | 5 to 10°F | 55 km |
| 86016 | 6b | -5 to 0°F | 57 km |
| 86046 | 7a | 0 to 5°F | 75 km |
| 86435 | 7a | 0 to 5°F | 77 km |
| 86036 | 7b | 5 to 10°F | 80 km |
| 86022 | 7a | 0 to 5°F | 85 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00026471, at 36.1067, -112.0947, elevation 771 m (2,530 ft).
- Data quality: Standard (24+ years of data), 25 years of freeze data.
- Average days per year at or below 32°F: 16.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Grand Canyon Visitor Center (5 km)
- Grand Canyon National Park 2 (8 km)
- Bright Angel Ranger Station (12 km)
- Grand Canyon National Park Airport (19 km)
- Grand Canyon E Entrance (25 km)
- Williams 35 NNW (45 km)
- Tuba City (76 km)
- Wupatki National Monument (92 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.